Exploring the transport properties of polytypic and twin-plane nanowires: from tunneling phase-time to spin-orbit interaction effects

The variety of nanowire crystal structures gave rise to unique and novel transport phenomena. In particular, we have explored the superlattice profile generated by strain field modulation in twinplane nanowires for the tuning of transport channels and the built-in spin-orbit potential profile of pol...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2015-03
Main Authors: M Rebello Sousa Dias, Villegas-Lelovsky, L, Diago-Cisneros, L, Castelano, L K, Cesar, D F, Marques, G E, Lopez-Richard, V
Format: Article
Language:English
Subjects:
Asymmetry
Crystal structure
Current carriers
Dependence
Group velocity
Nanowires
Runge-Kutta method
Spin-orbit interactions
Superlattices
Transport phenomena
Transport properties
Wave packets
Wave propagation
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The variety of nanowire crystal structures gave rise to unique and novel transport phenomena. In particular, we have explored the superlattice profile generated by strain field modulation in twinplane nanowires for the tuning of transport channels and the built-in spin-orbit potential profile of polytypic nanowires, in order to realize a spin filter. The Multicomponent Scattering Approach has been used in terms of the Transfer Matrix Method to describe the phase-time of charge carriers. This system showed advantages for attaining conditions for the propagation of wave packets with negative group velocity. Moreover, the spin transport effect of a potential profile with volumetric spin-orbit bulk inversion asymmetry, as present on polytypic nanowires, was described through the Reverse Runge-Kutta Method. Using the peculiar symmetry of the excited states we have characterized a dominant spin dependence on structural parameters that results in effective spin filtering.
ISSN:2331-8422